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Nuts-and-Bolts

Nuts-and-Bolts is a set of small Java libraries which are used in hh.ru to create micro-services.

Main features

  • Extended configuration of Jetty:

    • fail-fast (does not accept new connections if all threads are busy)
    • built-in off-heap server cache
    • built-in monitoring
    • logging filters

  • JDBC:

    • using multiple data sources (master, slaves)
    • built-in monitoring of data source, connections and call stack before statement
    • timed-out statements
    • Embedded PostgreSQL for unit-testing

  • Hibernate:

    • transaction support for multiple data sources
    • extended logging for queries (requestId, controller name)

  • Kafka-integration:

    • consumers/producers configuration

Dependency management policy

All crucial dependencies in any NaB module have to be managed with parent pom dependency management to be able to provide these versions into app via pom import and guarantee version consistency with NaB required versions How to release a new version